What number must you add to complete the square? x^2+8x=15

Which of the following represents the range of the graph of f(x) below

The first side of a triangle measures 5 in less than the second side, the third side is 3 in more than the first side, and the perimeter is 17 in. how long is the third side? if s represents the length of the second side, which of the following represents the length of the third side? s-5 ws-2 s+ 3 next question ask for turn it in

What is the slope of the line (-7,2) (4,6)